package com.atguigu.educenter.controller;

import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import cn.hutool.http.HttpUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.atguigu.commonutils.JwtUtils;
import com.atguigu.educenter.entity.UcenterMember;
import com.atguigu.educenter.service.UcenterMemberService;
import com.atguigu.educenter.utils.ConstantWxUtils;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.net.URLEncoder;

/**
 * @author 34633
 */
@Controller//只请求地址不返回数据
@RequestMapping("/api/ucenter/wx")
public class WxApiController {

    @Autowired
    private UcenterMemberService memberService;

    /**
     * 2 获取扫描人信息，添加数据
     * @param code
     * @param state
     * @return
     */
    @GetMapping("callback")
    public String callback(String code, String state) {
        try {
            //1.获取code值，临时票据，类似于验证码
            //2.拿着code去请求微信的 一个固定的一个地址，得到access_token和openid
            String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";
            //拼接三个参数 ：id  秘钥 和 code值
            String accessTokenUrl = String.format(
                    baseAccessTokenUrl,
                    ConstantWxUtils.WX_OPEN_APP_ID,
                    ConstantWxUtils.WX_OPEN_APP_SECRET,
                    code
            );
            //使用HttpUtil发送GET请求,请求拼接好的参数,得到返回得两个值，access_token和openid
            String accessTokenInfo = HttpUtil.createGet(accessTokenUrl)
                    .charset("utf-8")
                    .execute().body();

            //将返回结果转为json,获取出access_token和openid
            Object object = JSON.toJSON(accessTokenInfo);
            JSONObject resultJson = JSONObject.parseObject(object.toString());
            String access_token = resultJson.getString("access_token");
            String openid = resultJson.getString("openid");


            //把扫描人信息添加数据库里面
            //判断数据表里面是否存在相同微信信息，根据openid判断
            UcenterMember member = memberService.getOpenIdMember(openid);
            //memeber是空，表没有相同微信数据，进行添加
            if (member == null){
                //3.拿到得到得access_token和openid,再去请求微信提供得固定得地址,获取扫码人得信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                //拼接两个参数
                String userInfoUrl = String.format(
                        baseUserInfoUrl,
                        access_token,
                        openid
                );
                //发送请求
                String userInfo = HttpUtil.createGet(userInfoUrl)
                        .charset("utf-8")
                        .execute().body();

                System.out.println(userInfo);
                //取出用户得值,插入到数据库
                Object userinfo = JSON.toJSON(userInfo);
                JSONObject jsonUserinfo = JSONObject.parseObject(userinfo.toString());
                //昵称
                String nickname = jsonUserinfo.getString("nickname");
                //头像
                String headimgurl = jsonUserinfo.getString("headimgurl");


                member = new UcenterMember();
                member.setOpenid(openid);
                member.setNickname(nickname);
                member.setAvatar(headimgurl);
                memberService.save(member);
            }
            //使用jwt根据member对象生成token字符串
            String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());
            //最后：返回首页面，通过路径传递token字符串
            return "redirect:http://localhost:3000?token="+jwtToken;
        }catch (Exception e){
            throw new GuliException(20001,"登录失败");
        }

    }

    /**
     * 1生成微信扫描二维码
     * @return
     */
    @GetMapping("login")
    public String getWxCode(){
        // 微信开放平台授权baseUrl  %s相当于?代表占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";
        //对redirect_url进行URLEncoder编码
        String redirectUrl = ConstantWxUtils.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
        }catch(Exception e) {
        }

        //设置%s里面值
        String url = String.format(
                baseUrl,
                ConstantWxUtils.WX_OPEN_APP_ID,
                redirectUrl,
                "atguigu"
        );

        //重定向到请求微信地址里面
        return "redirect:"+url;
    }



}
